Surface ornamentation for a portion of a shoe sole



FIG. 1 is a bottom plan view of surface ornamentation for a portion of a shoe sole showing my new design; and,

FIG. 2 is a bottom plan view of a second embodiment thereof.

The broken line showing of a shoe sole in FIGS. 1-2 is environmental only and forms no part of the claimed design. 

The ornamental design for a surface ornamentation for a portion of a shoe sole, as shown and described. 